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From "Anthony Cozzie (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-8640) Paxos requires all nodes for CAS
Date Sat, 17 Jan 2015 00:29:35 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-8640?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Anthony Cozzie updated CASSANDRA-8640:
--------------------------------------
    Description: 
{code}
int requiredParticipants = participants + 1  / 2; // See CASSANDRA-833
{code}

Will always return participants because of operator precedence.  I am not sure just adding
parentheses will fix the problem, though, as the original code differentiated between pending
and natural endpoints.

{code}
 int requiredParticipants = pendingEndpoints.size() + 1 + naturalEndpoints.size() / 2; //
See CASSANDRA-833
{code}

  was:
{code}
int requiredParticipants = participants + 1  / 2; // See CASSANDRA-833
{code}

Fails owing to the order of operations.  I am not sure just adding parentheses will fix the
problem, though, as the original code differentiated between pending and natural endpoints.

{code}
 int requiredParticipants = pendingEndpoints.size() + 1 + naturalEndpoints.size() / 2; //
See CASSANDRA-833
{code}


> Paxos requires all nodes for CAS
> --------------------------------
>
>                 Key: CASSANDRA-8640
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8640
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Anthony Cozzie
>            Assignee: Sylvain Lebresne
>
> {code}
> int requiredParticipants = participants + 1  / 2; // See CASSANDRA-833
> {code}
> Will always return participants because of operator precedence.  I am not sure just adding
parentheses will fix the problem, though, as the original code differentiated between pending
and natural endpoints.
> {code}
>  int requiredParticipants = pendingEndpoints.size() + 1 + naturalEndpoints.size() / 2;
// See CASSANDRA-833
> {code}



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